Swarm of Sloths

When you cast Swarm of Sloths, an army of sloths apear. The sloths cannot fight, but they can bite through ropes and vines. If attacked , they will try to  dodge out of the way. roll a D20. If 10 or better, the sloth is safe. When you cast the spell, roll a D20. If you get less than 10, roll tell you get 10 or better. The number you get is the number of sloths apear. Each sloth has an armor class of 16. When you reach level 20, the D10 becomes a D100